Colour: Head and anterior half of body dark brown, becoming abruptly white posteriorly. A black spot at base of pectoral fins.
Habitat and Biology: Found on reef flats to upper slopes at depths down to at least 30 m. Feeds primarily on plankton.

Distribution: Indian Ocean, from the Red Sea to Christmas Island.

Remarks: Chromis dimidiata is common in the Maldives. It is often seen in small widely spaced stationary schools hovering 1 m or so above coral formations. Specimens from the Maldives tend to have the pale area extending anteriorly on the dorsal fin, unlike the specimens from further west.